I can't open any options, I get a white popup

Monken 6 aastat tagasi 0

I just reinstalled Windows 10, and Firefox with Sync and SpeedDial. I can see all my dials in EverHelper, but there is no way that I can open any option or setting, because I get only a white popup with a "Cancel" and "OK" buttons on the bottom, so I can do the synchronization to obtain all my dials back.